Center plate foe vehicles



i I v 3 Sheets-Sheet v v F. P. DAVIDSON.

CENTER PLATE FOR VEHICLES No. 506,419. Patented Oct. 10,1893.

(No Model.)

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- .P. P. DAVIDSON.

V CENTER-PLATE FOR VEHICLES. No. 506,419. Patented 001;.10, 1893.

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F. P. DAVIDSON. CENTER PLATE FOR VEHICLES.

3 Sheets-Sheet 3.

No. 506,419. Patented Oct. 10, 1893.

///////HIIIIIIIIII7/ AFIFTORNEY WITNESSES 602 M 7W UNITED STATES PATENT OFFICE.

FRANCIS P. DAVIDSON, OF JOLIET, ILLINOIS, AssIeNoR TO THE FOX SOLID PRE sED sTEEL ooMPANY, OF. SAME PLACE.

CENTER:PI .ATE FOR VIEHICLES.

SPECIFICATION forming part of Letters ratent'Nq. 506,419, dated October 10, 1893.

Application filed April 27, 1891. set-a1ro.t90.7 19. no model-l To all whom it may concern:

Be it known that I, FRANCIS P. DAVIDSON, of J oliet, Will county, State of Illinois, have invented a new and useful Improvement in Center Plates, of which-the following is a full, true, and exact description, reference being had to the accompanying drawings.

This invention relates toan improvement in center bearing plates for vehicles, and particularly to that class of such' plates ordinarily made of pressedsteel. In that class of plates in which a rib has been employed surrounding an upper entering plate, difiiculty has been experienced in maintaining contact between the wearing surfaces, the tendency being to wear at the outer circle of these plates. By my invention 1 avoidthis difficulty, and make a continuous contact between the wearing surfaces of the plates.

My invention will be readily understood from the accompanying drawings,in which- Figure 1 represents a topview of theplate A shown in Fig. 2; Fig. 2, a vertical section of the top and bottom plates A B; Fig. 3, a top view of the plate B in Fig. 2;Fig. 4, a top view of the plate shown at O in Fig.6;

Fig. 5, a section through the plates 0 B, Fig;

6, a top view of the plate B shown in Fig. 5. Fig. 7, represents a slightly diiferent structure 0f the upper-plate shown in Fig. 5; and Fig. 8, a cross-section through the same on the line 1 y, Fig. 7.

The form of the plate B shown in Figs. 4 and 5 varies somewhat from the form of the plate A shown in Figs. 1 and 2, both combining, however, with a lower plate B of substantially'the same form. The lower plate B,

preferably of pressed steel, has an elevation contact between the upper and lower plates is toward the center surrounding the holes H through which a bolt may pass. The amount of curvature may, of course, be varied,-and

in the form shown in Fig. 5 I prefer tohave it somewhat in excess of that shown by the drawings. It is plain that though the surfaces between the parts G and E are shown as curved they might be in fact conical without affecting the general character of the plate.

In Figs. 7 and 8 pockets or depressions M are'shown-in the upper plate, thereby enabling [greater rigidity in this plate, While, at the saline time,the full amount of bearing surface for the bolster is obtained.

Whfat pI claim as my invention, and desire sire to secure by Letters Patent, is-

'Thecombination of the plate B, rib D, and convex or conical portion E curving upward, with plate A having curved or conical portion G projecting downward, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of twosubscribin g witnesses.

FRANCIS P. DAVIDSON.

Witnesses:

E. B. CRAWFORD, HOWARD ABEL. 

